tap-parser

parse the test anything protocol

example

var parser = require('tap-parser');
var p = parser(function (results) {
    console.dir(results);
});

process.stdin.pipe(p);

given some TAP-formatted input:

$ node test.js
TAP version 13
# beep
ok 1 should be equal
ok 2 should be equivalent
# boop
ok 3 should be equal
ok 4 (unnamed assert)

1..4
# tests 4
# pass  4

# ok

parse the output:

$ node test.js | node parse.js
{ ok: true,
  asserts: 
   [ { ok: true, number: 1, name: 'should be equal' },
     { ok: true, number: 2, name: 'should be equivalent' },
     { ok: true, number: 3, name: 'should be equal' },
     { ok: true, number: 4, name: '(unnamed assert)' } ],
  pass: 
   [ { ok: true, number: 1, name: 'should be equal' },
     { ok: true, number: 2, name: 'should be equivalent' },
     { ok: true, number: 3, name: 'should be equal' },
     { ok: true, number: 4, name: '(unnamed assert)' } ],
  fail: [],
  todo: [],
  errors: [],
  plan: { start: 1, end: 4 } }

methods

var parser = require('tap-parser')

var p = parser(cb)

Return a writable stream p that emits parse events.

If cb is given it will listen for the 'results' event.

events

p.on('results', function (results) {})

results.errors is an array containing any parse errors, such as out of order assertions or missing plans.

p.on('assert', function (assert) {})

Every /^(not )?ok\b/ line will emit an 'assert' event.

Every assert object has these keys:

• assert.ok - true if the assertion succeeded, false if failed
• assert.number - the assertion number
• assert.name - optional short description of the assertion

and may also have

• assert.todo - optional description of why the assertion failure is not a problem.

When results are returned, each assert object will have been appended to the list asserts and one of (pass, fail, todo).

p.on('comment', function (comment) {})

Every /^# (.+)/ line will emit the string contents of comment.

p.on('plan', function (plan) {})

Every /^\d+\.\.\d+/ line emits a 'plan' event for the test numbers plan.start through plan.end, inclusive.

If the test is completely skipped the result will look like

{ ok: true,
  asserts: [],
  pass: [],
  fail: [],
  errors: [],
  plan: 
   { start: 1,
     end: 0,
     skip_all: true,
     skip_reason: 'This code has no seat belt' } }

p.on('version', function (version) {})

A /^TAP version (\d+)/ line emits a 'version' event with a version number or string.

p.on('extra', function (extra) {})

All other lines will trigger an 'extra' event with the line text.

install

With npm do:

npm install tap-parser

You can use browserify to require('tap-parser') in the browser.

license

MIT